JPH07865Y2 - Damper device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a damper device for opening and closing an opening such as a cool air outlet.

[Conventional technology]

For example, a passage for sending cold air cooled by a cooler to a freezer compartment or a refrigerating compartment is formed inside a freezer-refrigerator, and a baffle is provided at an opening portion of the passage so as to be openable and closable. This baffle opens and closes according to changes in the temperature inside the refrigerator, and functions to send the cool air in the freezer compartment into the refrigerating compartment when necessary.

By the way, this baffle is usually supported by a support shaft on one end so as to be openable and closable by a bearing on the frame side, and can be separated from the supporting part, that is, the frame, from the viewpoint of convenience of assembly and disassembly. It is in a state.

When this damper device is installed inside a refrigerator or the like, an icing phenomenon appears in a portion that comes into contact with cold air. In particular, when ice formation appears between the baffle and its bearing, the opening and closing operation of the baffle cannot be performed by the rotational force of the motor drive, which causes a failure.

[Purpose of device]

Therefore, an object of the present invention is to prevent icing of the baffle and the bearing portion and to smoothly open and close the baffle.

[Constitution of device]

To achieve the above object, the present invention provides a damper device that has a baffle that rotates about a support shaft and a bearing portion that supports the support shaft, and that opens and closes the opening by the baffle.
A support plate is provided integrally with the baffle, and a support shaft and a locking portion are respectively provided integrally with the support plate, and an ice-preventing gap is formed between the support plate and the bearing so that they do not come into direct contact with each other. In addition to the above, the baffle can be sealed in the opening by allowing the support shaft to move in the opening and closing direction through the gap in the bearing.

[Function of device]

According to the present invention, since a gap capable of preventing freezing is formed between the baffle support plate and the bearing portion, cold air does not stay in the gap, so that partial freezing is eliminated. Also,
Since the support shaft is in a state where it can move in the opening / closing direction within the range of the gap in the bearing, non-planar distortion occurs in the opening, and icing is formed in the lower part of the opening, resulting in high contact area. Even if the angle changes, the contact surface of the baffle fits into the opening surface of the opening and is in a state where it can always be sealed,
The tightness is improved.

〔Example〕

First, FIGS. 1 and 2 show a damper device 1 of the present invention.
Shows the overall configuration of.

The damper device 1 includes a frame 2 that can be separated from each other,
It is assembled by the baffle 3 and the motor drive unit 4.

The frame 2 is formed into a plate shape as a whole by using, for example, plastic, and an opening 5 is formed at a substantially central portion thereof, and a support plate 6 is integrally formed at an extension portion below the opening 5. . The opening 5 is surrounded by a rising wall 7 that is integrally provided along the opening edge, and the baffle 3 is formed at the end surface of the rising wall 7.
It corresponds to the packing 8 attached to the facing surface.
The outer rising portion 7a of the rising wall 7 has a curved surface, as shown in FIG. In addition, the curved surface makes it easier to remove even if there is icing.

Further, a thick mounting base 9 is formed on the left and right substantially central portions of the frame 2 and a lower portion thereof. Then, as shown in FIG. 4, the opening 5 and the pedestal 9 are left on the mounting surface side of the frame 2, and a gasket 10 which is slightly thicker than the opening 5 is attached by an appropriate adhesive or the like. Also, a rib for draining water is provided on the surface side of the baffle 2.
11 is integrally formed with a slope that is high on the side of the rising wall 7 and low on the outside.

The support plate 6 includes a pair of left and right bearings 12, a baffle stopper 13, and a mounting seat 15 for a leaf spring 14 below the baffle stopper 13 on the mounting side of the baffle 3.
The mounting seat 17 of the stopper 16, the screw hole 37, and the hole 19 for projecting the pressing pin 18 are integrally formed.

As shown in FIG. 5, the pair of bearing portions 12 are formed in an inverted U shape, and have a semicircular bearing surface 20 therein.
Is formed. Of these two bearings 12, one is formed at the edge of the support plate 6, and the other is formed slightly inside the edge of the support plate 6. . The inside of each bearing portion 12 is fitted into a pair of bearing projections 23 formed integrally with the case 22 of the motor drive portion 4 by a fitting portion 21 formed of a rectangular hole or groove.

The bearing protrusion 23 integrally forms a bearing surface 24 having a radius larger than that of the bearing surface 20. The pair of bearing surfaces 20 and 24 are for rotatably supporting the support shaft 25 formed inside the end edge portion of the support plate 6 of the baffle 3 therein, and the opening of the opening 5 is provided. A long bearing hole 26 is formed in the direction of a vertical line standing on the surface.

On the other hand, the motor drive unit 4 is incorporated inside the case 22 and converts the rotational force of the motor 27 mounted on the back side into a reciprocating linear motion by means of an internal reduction gear and an end face cam. Is transmitted to the pressing pin 18. The pressing pin 18 is fitted into the inside of a guide cylinder 28 formed integrally with the case 22 from the outside, and a hemispherical pressing surface 29 at the tip portion, as clearly shown in FIG. The contact surface 30 is formed by a cylindrical surface-shaped recess formed on the opposing surface. Further, the case 22 has a screw receiving portion 31 and a plurality of screw holes 32 for mounting which are fitted in the mounting seat 15 at appropriate positions.

The baffle 3 is integrally formed on the end face of the support plate 33 extending downward, with one end of the support shaft 25 supported toward one side surface. In this way
The support plate 33 is provided integrally with the baffle 3, and the support shaft 25 is provided integrally with the support plate 33 at the end surface position thereof.

The support shaft 25 fits into the bearing hole 26 only at the small diameter portion at the tip, and the support plate 33 and the bearing portion 12 are provided at the base end portion of the support shaft 25 between the support plate 33 and the bearing portion 12 at the base end portion thereof. A large-diameter portion 36 is formed as a locking portion that prevents direct contact with. The end portion of the large diameter portion 36 abuts the side surfaces of the bearing portion 12 and the bearing protrusion 23. As a result,
As shown in FIG. 7, the support plates 33 face each other while forming a freezing prevention gap at the end on the bearing portion 12 side.

The supporting plate 33 on the right side in FIG. 7 has a flat contact surface 34 corresponding to the cylindrical baffle stopper 13. An escape hole 35 is formed in the support plate 33. The escape hole 35 is formed to allow the stopper 16 and the mounting seat 17 to project to the back side of the baffle 3 and prevent cold air accumulation.

Then, the frame 2 is a portion on the back side of the support plate 6,
It is applied to the case 22 of the motor drive unit 4, and the screw holes 37, 32
It is integrated by screwing a mounting screw 38 into the portion of. When the frame 2 and the motor drive unit 4 are combined in this manner, the bearing surfaces 20 and 24 form a rectangular bearing hole 26. When these are combined, the bearing projections 23 are combined inside the bearing portion 12, and the screw receiving portion 31 is fitted inside the mounting seat 15, so that the frame 2 and the motor drive portion 4 can be positioned at the time of attachment. Is done.

In such a combined state, the pressing pin 18 is inserted into the guide cylinder 28, and subsequently, the support shafts 25 of the baffle 3 are inserted into the respective bearing holes 26 from the side, that is, the first shaft.
Inserted from left to right in the figure. At this time, the baffle 3 is operated in a state of being substantially perpendicular to the support plate 6. Therefore, at the time of this assembling, the baffle stopper 13 is in a position that does not hinder the movement of the baffle 3 in the combination direction.

When the support shaft 25 is completely fitted in the bearing hole 26, the baffle stopper 13 is rotated in a direction in which the baffle 3 is parallel to the frame 2 so that the baffle stopper 13 moves to one side as shown in FIG. The baffle 3 comes into contact with the abutment surface 34 on the back side of the support shaft 25 in a line contact state, and regulates the movement of the baffle 3 in the direction of removal. Further, in this state, the pressing surface 29 of the pressing pin 18 is
As shown in FIG. 6, it faces the inside of the contact surface 30 of the baffle 3. In this state, the stopper 16 is attached to the attachment seat 17 with the set screw 39 or the like.

Finally, the leaf spring 14 is attached to the attachment seat 15 with the set screw 40. The set screw 40 serves to fix the leaf spring 14 and at the same time to fix the frame 2 to the support plate 6. As a result, the maximum opening angle of the baffle 3 is regulated. This leaf spring 14 is urged by a widthwise formed ridge 41 in a direction in which it contacts the back side of the baffle 3 and always closes it, that is, a direction in which the packing 8 is pressed against the rising wall 7 of the opening 5. is doing. The leaf spring 14 is positioned by the projection 42 formed on the mounting seat 15 and the positioning hole 43 formed in the base end portion of the leaf spring 14.

The damper device 1 is attached to the ventilation path of a refrigerator or the like by the frame 2. As described above, the pressing pin 18 receives the rotational force of the motor 27 and reciprocates in the axial direction.

When the push pin 18 is depressed, the baffle 3
Under the urging force of the leaf spring 14, the packing 8 on the front surface thereof is pressed against the end surface of the rising wall 7 of the opening 5, that is, the opening surface. At this time, since the support shaft 25 is in a state where it can move in the long direction within the range of the gap inside the bearing hole 26, the packing 8 of the baffle 3 is completely parallel to the opening surface of the rising wall 7. Then, the opening 5 is closed. Therefore, even if a non-planar strain is generated in the opening 5 due to the attachment of the frame 2 or a recess that is not parallel to the opening surface is formed in the contact portion of the packing 8, the support shaft 25 has a rectangular shape. Since it is movable inside the bearing hole 26, the packing 8 of the baffle 3 conforms to the opening surface of the opening 5 and can always seal it.

In this state, if the internal temperature of the refrigerator compartment rises, the motor 27
Since a drive current is applied to the motor 27, the motor 27 pushes the pressing pin 18 with its rotational force to resist the biasing force of the leaf spring 14,
Rotate the baffle 3 in the opening direction. At this time, the pressing pin 18 is moved by the hemispherical pressing surface 29 at the tip of the baffle 3.
Since it hits the contact surface 30 in a state close to rolling contact, the wear of that portion is reduced.

During this opening operation, the baffle stopper 13 and the contact surface
If there is icing near 34, the opening operation of baffle 3
It must be done while destroying the icing. In that case, the baffle stopper 13 is located near the support shaft 25, and the point of action of the external force, that is, the position of the pressing pin 18 is sufficiently separated from the support shaft 25. Also, a large force can be exerted on the icing portion of the contact surface 34. Therefore, even if icing occurs on that portion, the baffle 3 can be opened and closed with a light force, that is, even if the torque of the motor 27 is small.

In particular, the support plate 33 is attached to the support shaft 25 between the bearing portion 12 and the support plate 33.
Since a large diameter portion 36 serving as a locking portion that prevents direct contact between the bearing portion 12 and the bearing portion 12 is formed, and a gap that is unlikely to form ice is formed between them, cold air does not stay in that portion and the bearing portion The ice accretion between 12 and the support plate 33 can be avoided in advance.

In this way, when the opening 5 is opened, cold air is sent into the refrigerating compartment through the opening. In addition,
The cold air hits the packing 8 of the baffle 3 and flows out laterally, but a part thereof is also discharged from the escape hole 35.

In such an open state, icing is likely to occur around the opening 5, especially on the outer peripheral portion of the rising wall 7. However, since the rising wall 7 rises while forming a curved surface on the outer side portion, it is difficult for ice to land on that portion, and even if ice is landed, it is easily removed. Further, even if the ice accretion portion is thawed and flows down along the side surface of the rising wall 7, it is guided to the outside by the draining ribs 11, so that the water droplets are directed to the central portion of the frame 2, particularly to the motor drive portion 4. It is in a state where it does not enter the part of.

In this way, when the internal temperature of the refrigerating room falls to a predetermined temperature, the motor 27 receives an external signal and restarts,
The push pin 18 is retracted. This makes the baffle 3
The opening 5 is closed by being biased by the leaf spring 14 with the support shaft 25 as the center of rotation. During such opening and closing operations, leaf springs
The 14 ridges 41 move while sliding on the back surface of the baffle 3, but due to the ridges 41 in the width direction, the ridges 41 are in line contact with each other, so that local wear of the contact portion is eliminated, and therefore, Smooth movement can be secured for a long time.

[Effect of device]

According to the present invention, in a damper device in which a support plate is formed integrally with a baffle, and a support shaft integrated with the support plate is rotatably supported by a bearing portion, a locking portion is provided between the support plate and the bearing portion. Since there is a gap that can prevent icing due to the presence of ice and there is no cold air retention, it is difficult for icing to occur at that part. Opening and closing operations can be performed smoothly.

Especially, since the support shaft is in a state where it can move in the opening and closing directions within the range of the gap in the bearing, non-planar distortion occurs in the opening, and there is icing in the lower part of the opening. Even if the height of the baffle changes, the abutment surface of the baffle fits into the opening surface of the opening and is in a state in which it can be sealed at all times, so the sealing performance is improved.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of the damper device of the present invention, FIG. 2 is a side view of the damper device in an assembled state, FIG. 3 is an enlarged cross-sectional view of an opening, and FIG. FIG. 5 is an enlarged side view of the bearing portion, FIG. 6 is an enlarged sectional view of a portion showing the relationship between the pressing pin and the contact surface, and FIG. 7 is a front view of the bearing portion and the baffle stopper. Is. 1 ... Damper device, 2 ... Frame, 3 ... Baffle, 4 ... Motor drive part, 5 ... Opening part, 7 ... Rising wall, 8 ... Packing, 12 ... Bearing part, 13 ... Baffle Stopper, 14 …… Leaf spring, 18 …… Push pin, 20…
… Bearing surface, 21… Fitting part, 22… Case, 23…
… Bearing projection, 24 …… Bearing surface, 25 …… Support shaft, 27 …… Motor, 29 …… Pressing surface, 30 …… Contact surface, 33 …… Support plate,
34 …… Abutting surface, 36 …… Large diameter part as locking part, 41 …… Ridge.

Claims (1)

[Scope of utility model registration request] 1. A baffle (3) that rotates about a support shaft (25) and a bearing portion (12) that supports the support shaft (25), and an opening is formed by the baffle (3). In the damper device (1) for opening and closing (5), the baffle (3) is used.
A support plate (33) integrally provided with the support shaft (25) is integrally formed with the support plate (33) and the support plate (33) between the support plate (33) and the bearing portion (12). Bearing part (1
2) A locking part (36) is formed so as not to come into direct contact with the same, and a clearance is formed in the bearing part (12) so that the support shaft (25) can move in the opening and closing direction of the baffle (3). Damper device characterized by.